... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

... One of the more amusing ones is the mysterious ability to balance eggs on end at the Vernal Equinox (curiously, no such claims are made at the Autumnal Equinox). ... Every year, without fail, some TV station broadcasts a news segment showing local school children standing eggs on end on the first day of spring. ... If you can stand an egg on its end on the Spring Equinox, surely you can on the Autumnal Equinox as well! ... At any day of the year, grab a carton of eggs and try to stand each one. ...

... Figure 3: Organisation of the EPIC-MOS chain: Bad pixels search. ... In most cases relying on the bad pixels registered in the CCF is not enough. ... Then one of two bad pixel finding algorithms is called (Fig 3 ), depending on badpixfindalgo . ... For badpixfindalgo =EM (or not set), the algorithm is called a third time (incrementally) on energies below 500 eV (and after flare screening), unless lowenerbadpix =N. This sometimes detects bad pixels more easily, because most appear at low energy. ...

Next: Construction of Flat Up: Off-line Reduction Previous: Off-line Reduction . Before most of the reduction process can be conducted, bad pixel values must be removed. ... The LAMP ON or LAMP OFF flat field images are a good place to start to define your bad-pixel map. ... In MIDAS, bad pixel detection is possible with the command MASK/IRAC2 ; the command CMASK/IRAC2 can be used for bad pixel removal. Refer to the MIDAS manual for further documentation of these commands. ...

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